Today it is not needed. I would take one low noise dual opamp and combine it with one more single fast opamp that has better output stage, adding few resistors. The result will be one opamp that you can't beat by discrete designed opamp.

I certainly agree that many op amp parameters can be improved by using composite/multiloop monolithic designs; extreme low noise, hi V swing are the main limitations - limits that are only relevant for a very few home diy audio applications

And as remarked, he thought he was the first to conceive of the use of inductors in the emitters to limit gain at high frequencies, but it was, like so many things, prior art, which (like they do more times than not) the USPTO missed.

To be fair the schematics of the modules were not published until much later. In 1966 they would have been a trade secret, and if Dick invented it I have no idea why it was not patented at the time.

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"The question of who is right and who is wrong has seemed to me always too small to be worth a moment's thought, while the question of what is right and what is wrong has seemed all-important."

I certainly agree that many op amp parameters can be improved by using composite/multiloop monolithic designs; extreme low noise, hi V swing are the main limitations - limits that are only relevant for a very few home diy audio applications

High voltage opamps for an output stage are available. It is not a problem. And an opamp made of several opamps will be still discrete. Or, I can make a hybrid IC containing couple of case-less chips, one with low noise dual opamp, another with high voltage opamp. It can even fit into existing DIP sockets.

No, FET input and as simple as possible. I'd say it needs to outperform an OP627 on all audio specs.

EVUL's right it needs to use cheap readily available parts. The 2mV max offset is unrealistic with hand matched devices even most discrete duals are worse.

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"The question of who is right and who is wrong has seemed to me always too small to be worth a moment's thought, while the question of what is right and what is wrong has seemed all-important."

Here is My challenge for a descrete opamp --> using any topology and transistor types (except expensive and/rare/obsolete/exotic types): no more than 8 transistors; drive 30 ohms or lower with no more than -105db harmonics, 20-20Khz; S/N ref 1v -unweighted to be at least -110db (input shorted). ; no use of dc servo, allowed - dc offset at output less than 2mV over time and normal use temp range. all when used at gain = 10 or less.

I think, the question should start from what the market would prefer: an analog of a famous opamp, or an opamp that would beat the famous opamp, or a preamp that will beat preamps that used that famous opamp?